intmain(void){intr;/* pthread_t thr; *//* pthread_attr_t thra; */pthread_mutexattr_tmxa, mxa2;pthread_mutex_tmx, mx2, mx3, mx4;pthread_cond_tcv;structtimespecabstime;pthread_rwlock_trwl;pthread_rwlock_trwl2;pthread_rwlock_trwl3;sem_ts1;#if__GLIBC_PREREQ(2,4)fprintf(stderr,"\n...
pthread_mutex_trylock()不会设置errno-只需使用返回值：
pthread_mutex_trylock()不会设置errno-只需使用返回值：